Theater Solutions Contractor Series In-Ceiling Speakers are newly designed for consumers who demand powerful bass in a compact package. Their easy in-ceiling installation and ultra wide sound dispersion design make them ideal for discreet, single or multi-room installations. All of Theater Solutions models feature the latest swing-out dog leg mounting system for easy installation, paint-able white aluminum. The polypropylene mica driver was designed for extended throw providing a full range of tones coupled with time-tested toughness. The 1 in. Mylar dome tweeter is located inside the woofer to direct sound at listeners, and its back chamber smooths and extends its performance. These state of the art components all add up to superior quality and design at a value that is second to none. Theater Solutions CS4C in ceiling speakers, recommended power is 10-150-Watt per speaker, efficiency is 89dB, frequency response is 70Hz-20 kHz, 8ohm, 2-way design and functionality 4 in. extended throw woofers with polypropylene mica cones, 1 in. coaxial mylar dome tweeters, paint-able frames and grills, low profile housings designed for easy installation Unique wall locking mounting system, no mounting hardware needed, cut out templates and full instructions included, designed and engineered in the USA Cut out size is 5.75 in. per speaker, overall size is 6.875 in. per speaker, mounting depth is 2 in. per speaker Use for in-wall or in-ceiling home entertainment, surround sound, home theater, offices or commercial, this listing and price is for 1 pair / 2 in-ceiling speakers